./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:37:12,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:37:12,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:37:12,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:37:12,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:37:12,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:37:12,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:37:12,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:37:12,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:37:12,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:37:12,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:37:12,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:37:12,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:37:12,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:37:12,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:37:12,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:37:12,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:37:12,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:37:12,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:37:12,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:37:12,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:37:12,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:37:12,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:37:12,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:37:12,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:37:12,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:37:12,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:37:12,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:37:12,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:37:12,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:37:12,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:37:12,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:37:12,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:37:12,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:37:12,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:37:12,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:37:12,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:37:12,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:37:12,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:37:12,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:37:12,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:37:12,223 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:37:12,263 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:37:12,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:37:12,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:37:12,264 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:37:12,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:37:12,265 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:37:12,265 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:37:12,266 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:37:12,266 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:37:12,266 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:37:12,267 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:37:12,267 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:37:12,268 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:37:12,268 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:37:12,268 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:37:12,268 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:37:12,268 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:37:12,269 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:37:12,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:37:12,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:37:12,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:37:12,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:37:12,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:37:12,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:37:12,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:37:12,271 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:37:12,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:37:12,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:37:12,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:37:12,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:37:12,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:37:12,273 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:37:12,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:37:12,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:37:12,273 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:37:12,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:37:12,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:37:12,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:37:12,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 [2022-11-03 03:37:12,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:37:12,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:37:12,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:37:12,571 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:37:12,572 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:37:12,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2022-11-03 03:37:12,646 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/data/dfe2879d0/f6e82c75e45d4fc4bb2e62cad9ef8661/FLAGa4a81a358 [2022-11-03 03:37:13,648 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:37:13,649 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2022-11-03 03:37:13,682 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/data/dfe2879d0/f6e82c75e45d4fc4bb2e62cad9ef8661/FLAGa4a81a358 [2022-11-03 03:37:14,073 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/data/dfe2879d0/f6e82c75e45d4fc4bb2e62cad9ef8661 [2022-11-03 03:37:14,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:37:14,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:37:14,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:37:14,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:37:14,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:37:14,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:37:14" (1/1) ... [2022-11-03 03:37:14,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c6eca56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:14, skipping insertion in model container [2022-11-03 03:37:14,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:37:14" (1/1) ... [2022-11-03 03:37:14,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:37:14,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:37:14,576 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2022-11-03 03:37:14,585 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2022-11-03 03:37:15,643 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:15,644 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:15,645 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:15,646 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:15,647 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:15,664 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:15,665 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:15,667 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:15,668 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:15,670 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:15,671 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:15,672 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:15,673 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:16,088 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 03:37:16,092 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 03:37:16,093 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 03:37:16,095 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 03:37:16,096 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 03:37:16,097 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 03:37:16,098 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 03:37:16,098 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 03:37:16,099 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 03:37:16,100 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 03:37:16,245 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 03:37:16,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:37:16,301 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:37:16,318 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2022-11-03 03:37:16,319 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2022-11-03 03:37:16,374 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:16,375 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:16,375 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:16,376 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:16,377 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:16,386 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:16,387 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:16,388 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:16,389 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:16,391 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:16,392 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:16,393 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:16,393 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:37:16,494 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 03:37:16,496 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 03:37:16,497 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 03:37:16,501 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 03:37:16,502 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 03:37:16,503 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 03:37:16,510 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 03:37:16,511 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 03:37:16,512 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 03:37:16,513 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 03:37:16,562 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 03:37:16,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:37:16,965 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:37:16,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:16 WrapperNode [2022-11-03 03:37:16,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:37:16,967 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:37:16,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:37:16,967 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:37:16,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:16" (1/1) ... [2022-11-03 03:37:17,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:16" (1/1) ... [2022-11-03 03:37:17,157 INFO L138 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 136 [2022-11-03 03:37:17,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:37:17,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:37:17,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:37:17,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:37:17,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:16" (1/1) ... [2022-11-03 03:37:17,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:16" (1/1) ... [2022-11-03 03:37:17,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:16" (1/1) ... [2022-11-03 03:37:17,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:16" (1/1) ... [2022-11-03 03:37:17,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:16" (1/1) ... [2022-11-03 03:37:17,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:16" (1/1) ... [2022-11-03 03:37:17,199 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:16" (1/1) ... [2022-11-03 03:37:17,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:16" (1/1) ... [2022-11-03 03:37:17,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:37:17,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:37:17,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:37:17,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:37:17,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:16" (1/1) ... [2022-11-03 03:37:17,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:37:17,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:37:17,254 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:37:17,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:37:17,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:37:17,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 03:37:17,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 03:37:17,319 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-03 03:37:17,319 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-03 03:37:17,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:37:17,320 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-03 03:37:17,320 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-03 03:37:17,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:37:17,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:37:17,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:37:17,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:37:17,322 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:37:17,322 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:37:17,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:37:17,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:37:17,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 03:37:17,323 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-03 03:37:17,323 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-03 03:37:17,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:37:17,625 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:37:17,627 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:37:18,014 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:37:18,180 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:37:18,180 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 03:37:18,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:37:18 BoogieIcfgContainer [2022-11-03 03:37:18,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:37:18,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:37:18,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:37:18,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:37:18,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:37:14" (1/3) ... [2022-11-03 03:37:18,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355447d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:37:18, skipping insertion in model container [2022-11-03 03:37:18,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:16" (2/3) ... [2022-11-03 03:37:18,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355447d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:37:18, skipping insertion in model container [2022-11-03 03:37:18,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:37:18" (3/3) ... [2022-11-03 03:37:18,200 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rend_harness.i [2022-11-03 03:37:18,224 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:37:18,224 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:37:18,309 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:37:18,320 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2cf1166e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:37:18,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:37:18,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-03 03:37:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 03:37:18,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:18,339 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:37:18,340 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:18,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:18,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1338419167, now seen corresponding path program 1 times [2022-11-03 03:37:18,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:37:18,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359105950] [2022-11-03 03:37:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:18,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:37:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:37:19,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:37:19,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359105950] [2022-11-03 03:37:19,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359105950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:37:19,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228927555] [2022-11-03 03:37:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:19,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:37:19,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:37:19,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:37:19,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:37:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:19,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-03 03:37:19,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:19,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 03:37:19,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 03:37:20,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:20,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:20,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:20,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-11-03 03:37:20,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:20,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:20,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:20,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-11-03 03:37:22,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:22,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:37:22,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:22,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:22,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:37:22,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:37:22,233 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:37:22,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 118 treesize of output 72 [2022-11-03 03:37:22,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:37:22,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:22,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:37:22,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:22,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:22,276 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:37:22,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 88 treesize of output 42 [2022-11-03 03:37:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:37:22,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:22,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228927555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:22,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:37:22,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-11-03 03:37:22,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596708220] [2022-11-03 03:37:22,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:22,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:37:22,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:37:22,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:37:22,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:37:22,356 INFO L87 Difference]: Start difference. First operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:37:22,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:22,882 INFO L93 Difference]: Finished difference Result 115 states and 170 transitions. [2022-11-03 03:37:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:37:22,885 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2022-11-03 03:37:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:22,895 INFO L225 Difference]: With dead ends: 115 [2022-11-03 03:37:22,895 INFO L226 Difference]: Without dead ends: 77 [2022-11-03 03:37:22,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:37:22,901 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 14 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:22,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 266 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 125 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2022-11-03 03:37:22,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-03 03:37:22,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2022-11-03 03:37:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-11-03 03:37:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2022-11-03 03:37:22,957 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 37 [2022-11-03 03:37:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:22,958 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2022-11-03 03:37:22,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:37:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2022-11-03 03:37:22,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 03:37:22,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:22,961 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:37:23,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 03:37:23,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:37:23,177 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:23,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:23,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2113362132, now seen corresponding path program 1 times [2022-11-03 03:37:23,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:37:23,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047242150] [2022-11-03 03:37:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:23,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:37:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:37:23,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:37:23,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047242150] [2022-11-03 03:37:23,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047242150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:37:23,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439271337] [2022-11-03 03:37:23,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:23,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:37:23,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:37:23,490 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:37:23,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:37:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:23,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-03 03:37:23,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:23,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 03:37:23,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 03:37:23,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:23,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:23,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 03:37:23,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:23,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-03 03:37:23,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:23,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:23,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 03:37:23,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:23,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-03 03:37:24,116 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 03:37:24,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_58| input size 65 context size 65 output size 65 [2022-11-03 03:37:24,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1924001490] [2022-11-03 03:37:24,142 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-03 03:37:24,142 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:37:24,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:37:24,154 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:37:24,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:37:24,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,303 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:37:24,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:37:24,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 03:37:24,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 03:37:24,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:37:24,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:37:24,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:37:24,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:37:24,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:24,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:37:25,008 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 03:37:25,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 03:37:25,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 03:37:25,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:37:25,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,238 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 03:37:25,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2022-11-03 03:37:25,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,434 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 03:37:25,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 03:37:25,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 03:37:25,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:37:25,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:37:25,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 03:37:25,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:37:25,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 03:37:25,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 03:37:25,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 03:37:25,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 03:37:25,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 03:37:25,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:37:25,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:25,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:37:26,783 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-03 03:37:27,080 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 144 for LOIs [2022-11-03 03:37:27,152 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 03:37:27,184 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:37:30,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1924001490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:30,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:37:30,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 16 [2022-11-03 03:37:30,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036638417] [2022-11-03 03:37:30,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:30,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 03:37:30,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:37:30,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 03:37:30,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:37:30,610 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:37:31,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:31,285 INFO L93 Difference]: Finished difference Result 98 states and 125 transitions. [2022-11-03 03:37:31,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:37:31,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2022-11-03 03:37:31,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:31,288 INFO L225 Difference]: With dead ends: 98 [2022-11-03 03:37:31,289 INFO L226 Difference]: Without dead ends: 51 [2022-11-03 03:37:31,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:37:31,291 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:31,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 247 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-11-03 03:37:31,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-03 03:37:31,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2022-11-03 03:37:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 03:37:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-11-03 03:37:31,308 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 38 [2022-11-03 03:37:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:31,309 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-11-03 03:37:31,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:37:31,309 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-11-03 03:37:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 03:37:31,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:31,311 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:37:31,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 03:37:31,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 03:37:31,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:31,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:31,539 INFO L85 PathProgramCache]: Analyzing trace with hash -303925925, now seen corresponding path program 1 times [2022-11-03 03:37:31,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:37:31,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499069450] [2022-11-03 03:37:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:31,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:37:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:37:31,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:37:31,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499069450] [2022-11-03 03:37:31,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499069450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:37:31,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015282733] [2022-11-03 03:37:31,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:31,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:37:31,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:37:31,843 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:37:31,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:37:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:32,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:37:32,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:37:32,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:32,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015282733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:32,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:37:32,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-03 03:37:32,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128995996] [2022-11-03 03:37:32,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:32,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:37:32,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:37:32,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:37:32,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:37:32,132 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:37:32,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:32,336 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2022-11-03 03:37:32,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:37:32,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 39 [2022-11-03 03:37:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:32,338 INFO L225 Difference]: With dead ends: 86 [2022-11-03 03:37:32,338 INFO L226 Difference]: Without dead ends: 52 [2022-11-03 03:37:32,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:37:32,340 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:32,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 141 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:37:32,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-03 03:37:32,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-03 03:37:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-03 03:37:32,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-11-03 03:37:32,356 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 39 [2022-11-03 03:37:32,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:32,356 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-11-03 03:37:32,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:37:32,357 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-11-03 03:37:32,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 03:37:32,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:32,358 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:37:32,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:32,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:37:32,564 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:32,564 INFO L85 PathProgramCache]: Analyzing trace with hash 840951937, now seen corresponding path program 1 times [2022-11-03 03:37:32,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:37:32,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766252868] [2022-11-03 03:37:32,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:32,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:37:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:37:32,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:37:32,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766252868] [2022-11-03 03:37:32,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766252868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:37:32,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224096172] [2022-11-03 03:37:32,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:32,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:37:32,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:37:32,816 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:37:32,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:37:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:32,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:37:32,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:37:33,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:33,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224096172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:33,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:37:33,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-03 03:37:33,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276593385] [2022-11-03 03:37:33,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:33,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:37:33,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:37:33,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:37:33,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:37:33,080 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:37:33,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:33,343 INFO L93 Difference]: Finished difference Result 103 states and 141 transitions. [2022-11-03 03:37:33,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:37:33,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2022-11-03 03:37:33,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:33,346 INFO L225 Difference]: With dead ends: 103 [2022-11-03 03:37:33,346 INFO L226 Difference]: Without dead ends: 64 [2022-11-03 03:37:33,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:37:33,347 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 63 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:33,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 165 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:37:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-03 03:37:33,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-11-03 03:37:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-03 03:37:33,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2022-11-03 03:37:33,365 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 41 [2022-11-03 03:37:33,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:33,365 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-11-03 03:37:33,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:37:33,365 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2022-11-03 03:37:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 03:37:33,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:33,367 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:37:33,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:33,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:37:33,582 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:33,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:33,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1878159694, now seen corresponding path program 1 times [2022-11-03 03:37:33,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:37:33,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761984374] [2022-11-03 03:37:33,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:33,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:37:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:37:33,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:37:33,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761984374] [2022-11-03 03:37:33,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761984374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:37:33,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407894155] [2022-11-03 03:37:33,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:33,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:37:33,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:37:33,870 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:37:33,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:37:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:34,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:37:34,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:37:34,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:34,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407894155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:34,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:37:34,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-03 03:37:34,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248008553] [2022-11-03 03:37:34,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:34,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:37:34,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:37:34,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:37:34,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:37:34,099 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:37:34,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:34,160 INFO L93 Difference]: Finished difference Result 104 states and 145 transitions. [2022-11-03 03:37:34,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:37:34,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-11-03 03:37:34,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:34,163 INFO L225 Difference]: With dead ends: 104 [2022-11-03 03:37:34,163 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 03:37:34,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:37:34,165 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:34,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:37:34,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 03:37:34,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-11-03 03:37:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-03 03:37:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-11-03 03:37:34,180 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 42 [2022-11-03 03:37:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:34,181 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-11-03 03:37:34,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:37:34,181 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-11-03 03:37:34,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 03:37:34,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:34,182 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:37:34,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:34,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:37:34,395 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:34,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:34,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1695628998, now seen corresponding path program 1 times [2022-11-03 03:37:34,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:37:34,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397033947] [2022-11-03 03:37:34,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:34,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:37:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:37:34,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:37:34,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397033947] [2022-11-03 03:37:34,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397033947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:37:34,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087677801] [2022-11-03 03:37:34,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:34,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:37:34,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:37:34,670 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:37:34,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:37:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:34,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-03 03:37:34,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:35,035 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 03:37:35,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-03 03:37:35,060 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:37:35,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 03:37:35,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 03:37:35,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-03 03:37:35,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2022-11-03 03:37:35,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-03 03:37:58,901 WARN L234 SmtUtils]: Spent 20.88s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:38:02,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:02,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:02,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:02,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:02,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:02,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:02,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:02,499 INFO L356 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2022-11-03 03:38:02,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 6 disjoint index pairs (out of 105 index pairs), introduced 11 new quantified variables, introduced 77 case distinctions, treesize of input 209 treesize of output 143 [2022-11-03 03:38:02,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:02,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:02,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:02,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:02,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:02,524 INFO L356 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2022-11-03 03:38:02,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 140 treesize of output 86 [2022-11-03 03:38:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:02,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:38:07,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087677801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:07,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1907772792] [2022-11-03 03:38:07,622 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-03 03:38:07,622 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:38:07,623 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:38:07,623 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:38:07,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:38:07,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:07,742 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:38:07,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:38:07,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:07,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 03:38:08,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:38:08,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:38:08,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:38:08,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 03:38:08,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 03:38:08,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 03:38:08,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:38:08,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:08,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 03:38:09,393 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 131 for LOIs [2022-11-03 03:38:10,145 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 183 for LOIs [2022-11-03 03:38:10,258 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 03:38:10,279 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-03 03:38:10,368 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:38:19,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1907772792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:38:19,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:38:19,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 42 [2022-11-03 03:38:19,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250504151] [2022-11-03 03:38:19,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:38:19,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 03:38:19,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:38:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 03:38:19,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 03:38:19,448 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 03:38:21,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:21,971 INFO L93 Difference]: Finished difference Result 121 states and 158 transitions. [2022-11-03 03:38:21,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:38:21,972 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2022-11-03 03:38:21,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:21,973 INFO L225 Difference]: With dead ends: 121 [2022-11-03 03:38:21,974 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 03:38:21,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 03:38:21,976 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:21,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 246 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 228 Invalid, 0 Unknown, 45 Unchecked, 0.7s Time] [2022-11-03 03:38:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 03:38:21,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-03 03:38:21,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 50 states have internal predecessors, (59), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (20), 14 states have call predecessors, (20), 15 states have call successors, (20) [2022-11-03 03:38:22,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2022-11-03 03:38:22,000 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 45 [2022-11-03 03:38:22,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:22,001 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2022-11-03 03:38:22,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 03:38:22,001 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2022-11-03 03:38:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 03:38:22,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:22,003 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:22,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:22,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 03:38:22,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:22,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:22,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1964135121, now seen corresponding path program 1 times [2022-11-03 03:38:22,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:38:22,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887535519] [2022-11-03 03:38:22,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:22,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:38:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:38:22,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:38:22,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887535519] [2022-11-03 03:38:22,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887535519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:38:22,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192367617] [2022-11-03 03:38:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:22,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:38:22,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:38:22,566 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:38:22,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:38:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:22,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 03:38:22,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:22,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 03:38:22,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:22,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 03:38:23,048 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 03:38:23,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_71| input size 53 context size 53 output size 53 [2022-11-03 03:38:23,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [976305138] [2022-11-03 03:38:23,051 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-03 03:38:23,052 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:38:23,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:38:23,052 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:38:23,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:38:23,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,160 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 03:38:23,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 03:38:23,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,261 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:38:23,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:38:23,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 03:38:23,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:38:23,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:38:23,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:38:23,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:23,729 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 03:38:23,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 03:38:23,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,864 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 03:38:23,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 03:38:23,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 03:38:23,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-03 03:38:23,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:38:23,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:23,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:24,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 03:38:24,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:24,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 03:38:24,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 03:38:24,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 03:38:24,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 03:38:24,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:38:24,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:38:24,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:38:24,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:38:24,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 03:38:24,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:24,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 03:38:24,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 03:38:24,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 03:38:24,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 03:38:24,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 03:38:24,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:38:24,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:38:25,339 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-03 03:38:25,829 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 164 for LOIs [2022-11-03 03:38:25,899 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 03:38:25,923 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-03 03:38:26,010 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:38:31,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [976305138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:38:31,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:38:31,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6] total 24 [2022-11-03 03:38:31,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924299110] [2022-11-03 03:38:31,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:38:31,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 03:38:31,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:38:31,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 03:38:31,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-11-03 03:38:31,458 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 03:38:32,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:32,135 INFO L93 Difference]: Finished difference Result 128 states and 165 transitions. [2022-11-03 03:38:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:38:32,136 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2022-11-03 03:38:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:32,137 INFO L225 Difference]: With dead ends: 128 [2022-11-03 03:38:32,137 INFO L226 Difference]: Without dead ends: 81 [2022-11-03 03:38:32,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:38:32,139 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:32,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 191 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 210 Invalid, 0 Unknown, 157 Unchecked, 0.5s Time] [2022-11-03 03:38:32,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-03 03:38:32,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-03 03:38:32,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 55 states have internal predecessors, (66), 17 states have call successors, (17), 10 states have call predecessors, (17), 11 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2022-11-03 03:38:32,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2022-11-03 03:38:32,170 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 46 [2022-11-03 03:38:32,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:32,171 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2022-11-03 03:38:32,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 03:38:32,171 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2022-11-03 03:38:32,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 03:38:32,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:32,176 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:32,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:32,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 03:38:32,383 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:32,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:32,383 INFO L85 PathProgramCache]: Analyzing trace with hash -850872160, now seen corresponding path program 1 times [2022-11-03 03:38:32,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:38:32,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592354277] [2022-11-03 03:38:32,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:32,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:38:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:38:33,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:38:33,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592354277] [2022-11-03 03:38:33,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592354277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:38:33,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737049299] [2022-11-03 03:38:33,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:33,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:38:33,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:38:33,387 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:38:33,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:38:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:33,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 03:38:33,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:43,802 WARN L234 SmtUtils]: Spent 8.38s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:38:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:38:44,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:38:46,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737049299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:46,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [325682077] [2022-11-03 03:38:46,506 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 03:38:46,506 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:38:46,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:38:46,507 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:38:46,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:38:46,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:46,629 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 03:38:46,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 03:38:46,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:46,737 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:38:46,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:38:47,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:38:47,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 03:38:47,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:38:47,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:38:47,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 03:38:47,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 03:38:47,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:38:47,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:47,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 03:38:48,074 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 136 for LOIs [2022-11-03 03:38:49,264 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 180 for LOIs [2022-11-03 03:38:49,354 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 03:38:49,374 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 03:38:49,449 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:39:10,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [325682077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:10,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:39:10,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-03 03:39:10,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640534170] [2022-11-03 03:39:10,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:10,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 03:39:10,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:10,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 03:39:10,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1158, Unknown=6, NotChecked=0, Total=1332 [2022-11-03 03:39:10,486 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 03:39:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:12,186 INFO L93 Difference]: Finished difference Result 146 states and 196 transitions. [2022-11-03 03:39:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:39:12,187 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2022-11-03 03:39:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:12,189 INFO L225 Difference]: With dead ends: 146 [2022-11-03 03:39:12,189 INFO L226 Difference]: Without dead ends: 98 [2022-11-03 03:39:12,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=188, Invalid=1288, Unknown=6, NotChecked=0, Total=1482 [2022-11-03 03:39:12,191 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 96 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:12,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 167 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 247 Invalid, 0 Unknown, 188 Unchecked, 0.9s Time] [2022-11-03 03:39:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-03 03:39:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2022-11-03 03:39:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.25) internal successors, (65), 55 states have internal predecessors, (65), 17 states have call successors, (17), 10 states have call predecessors, (17), 11 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2022-11-03 03:39:12,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2022-11-03 03:39:12,249 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 47 [2022-11-03 03:39:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:12,249 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2022-11-03 03:39:12,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 03:39:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2022-11-03 03:39:12,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 03:39:12,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:12,252 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:12,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:12,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 03:39:12,467 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:12,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:12,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1509868147, now seen corresponding path program 1 times [2022-11-03 03:39:12,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:12,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276609674] [2022-11-03 03:39:12,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:12,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:39:12,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:12,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276609674] [2022-11-03 03:39:12,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276609674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:39:12,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991900267] [2022-11-03 03:39:12,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:12,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:12,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:39:12,691 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:39:12,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:39:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:12,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:39:12,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:22,698 WARN L234 SmtUtils]: Spent 8.33s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:39:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:39:25,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:39:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:39:30,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991900267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:39:30,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1599425257] [2022-11-03 03:39:30,875 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 03:39:30,875 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:39:30,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:39:30,876 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:39:30,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:39:30,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:30,975 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:39:30,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:39:30,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:30,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 03:39:31,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:39:31,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 03:39:31,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:39:31,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:39:31,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:39:31,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 03:39:31,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 03:39:31,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 03:39:32,947 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 137 for LOIs [2022-11-03 03:39:33,022 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 131 for LOIs [2022-11-03 03:39:33,988 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 03:39:33,990 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 03:39:34,006 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 03:39:34,065 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:39:57,563 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3699#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0) 4)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0)) 16) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0)) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) (= 32 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0))) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) (not (= 5 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0))) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0)) 8) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0)) 8) 0) (not (= 2 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0))) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0)) 24) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0) 0)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0)) (not (= 3 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0))) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0)) 1) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0)) 16) 0) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_32|) 0)))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 5 |~#s_can_fail_allocator_static~0.base|) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:39:57,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:39:57,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:39:57,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 11] total 26 [2022-11-03 03:39:57,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464421704] [2022-11-03 03:39:57,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:39:57,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 03:39:57,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:57,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 03:39:57,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=2417, Unknown=4, NotChecked=0, Total=2756 [2022-11-03 03:39:57,567 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 10 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-03 03:40:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:00,807 INFO L93 Difference]: Finished difference Result 184 states and 274 transitions. [2022-11-03 03:40:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 03:40:00,808 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 10 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 48 [2022-11-03 03:40:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:00,810 INFO L225 Difference]: With dead ends: 184 [2022-11-03 03:40:00,810 INFO L226 Difference]: Without dead ends: 141 [2022-11-03 03:40:00,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 90 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=476, Invalid=3942, Unknown=4, NotChecked=0, Total=4422 [2022-11-03 03:40:00,812 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 111 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:00,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 329 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 561 Invalid, 0 Unknown, 92 Unchecked, 0.9s Time] [2022-11-03 03:40:00,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-03 03:40:00,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 125. [2022-11-03 03:40:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 87 states have internal predecessors, (99), 26 states have call successors, (26), 13 states have call predecessors, (26), 17 states have return successors, (49), 24 states have call predecessors, (49), 25 states have call successors, (49) [2022-11-03 03:40:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 174 transitions. [2022-11-03 03:40:00,896 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 174 transitions. Word has length 48 [2022-11-03 03:40:00,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:00,898 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 174 transitions. [2022-11-03 03:40:00,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 10 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-03 03:40:00,899 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 174 transitions. [2022-11-03 03:40:00,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 03:40:00,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:00,902 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:00,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:40:01,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:01,119 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:01,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:01,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2026562887, now seen corresponding path program 1 times [2022-11-03 03:40:01,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:01,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436445342] [2022-11-03 03:40:01,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:01,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:40:01,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:01,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436445342] [2022-11-03 03:40:01,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436445342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:40:01,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849143834] [2022-11-03 03:40:01,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:01,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:01,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:40:01,446 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:40:01,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:40:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:01,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-03 03:40:01,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:01,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 03:40:01,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:01,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 03:40:01,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 03:40:01,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:01,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 03:40:01,957 INFO L356 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-03 03:40:01,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_87| input size 57 context size 57 output size 57 [2022-11-03 03:40:01,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [82734137] [2022-11-03 03:40:01,960 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 03:40:01,960 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:40:01,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:40:01,961 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:40:01,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:40:01,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,069 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 03:40:02,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 03:40:02,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,185 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:40:02,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:40:02,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:40:02,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 03:40:02,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:40:02,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:40:02,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 03:40:02,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:02,681 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 03:40:02,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 03:40:02,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,827 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 03:40:02,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 03:40:02,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:02,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 03:40:02,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-03 03:40:02,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:02,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:40:03,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:03,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 03:40:03,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:03,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 03:40:03,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:03,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:03,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 03:40:03,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:03,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 03:40:03,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:40:03,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:40:03,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:40:03,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:03,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 03:40:03,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:03,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 03:40:03,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:03,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:03,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 03:40:03,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:03,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 03:40:03,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:40:03,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:03,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:40:03,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:03,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:03,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 03:40:03,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:03,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 03:40:03,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:03,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:40:04,146 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-03 03:40:04,993 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 164 for LOIs [2022-11-03 03:40:05,038 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 03:40:05,055 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 03:40:05,116 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:40:09,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [82734137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:09,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:40:09,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7] total 26 [2022-11-03 03:40:09,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389479693] [2022-11-03 03:40:09,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:09,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 03:40:09,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:09,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 03:40:09,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:40:09,946 INFO L87 Difference]: Start difference. First operand 125 states and 174 transitions. Second operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 03:40:11,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:11,817 INFO L93 Difference]: Finished difference Result 236 states and 323 transitions. [2022-11-03 03:40:11,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 03:40:11,817 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 62 [2022-11-03 03:40:11,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:11,819 INFO L225 Difference]: With dead ends: 236 [2022-11-03 03:40:11,819 INFO L226 Difference]: Without dead ends: 149 [2022-11-03 03:40:11,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 03:40:11,821 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:11,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 211 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 330 Invalid, 0 Unknown, 166 Unchecked, 0.8s Time] [2022-11-03 03:40:11,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-03 03:40:11,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 95. [2022-11-03 03:40:11,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 59 states have (on average 1.152542372881356) internal successors, (68), 62 states have internal predecessors, (68), 22 states have call successors, (22), 11 states have call predecessors, (22), 13 states have return successors, (25), 21 states have call predecessors, (25), 21 states have call successors, (25) [2022-11-03 03:40:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2022-11-03 03:40:11,891 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 62 [2022-11-03 03:40:11,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:11,891 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2022-11-03 03:40:11,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 03:40:11,892 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2022-11-03 03:40:11,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 03:40:11,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:11,893 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:11,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:40:12,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 03:40:12,111 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:12,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:12,111 INFO L85 PathProgramCache]: Analyzing trace with hash 557997523, now seen corresponding path program 1 times [2022-11-03 03:40:12,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:12,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942476030] [2022-11-03 03:40:12,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:12,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 03:40:12,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:12,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942476030] [2022-11-03 03:40:12,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942476030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:40:12,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315219801] [2022-11-03 03:40:12,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:12,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:12,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:40:12,479 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:40:12,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:40:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:12,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 03:40:12,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:40:12,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 03:40:13,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315219801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:13,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1413657913] [2022-11-03 03:40:13,111 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 03:40:13,111 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:40:13,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:40:13,111 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:40:13,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:40:13,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,203 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 03:40:13,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 03:40:13,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,302 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:40:13,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:40:13,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:40:13,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 03:40:13,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:40:13,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:40:13,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 03:40:13,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 03:40:13,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 03:40:13,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:13,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:40:23,755 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 150 for LOIs [2022-11-03 03:40:24,038 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 03:40:24,750 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 143 for LOIs [2022-11-03 03:40:24,790 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 03:40:24,808 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 03:40:24,875 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:40:45,253 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5153#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54| Int)) (and (not (= 5 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0) 16) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 8) 0) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 1) (not (= 4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 8) 0) (= (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 32) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|)) (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (not (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54| 0)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 24) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 16) 0))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 5 |~#s_can_fail_allocator_static~0.base|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:40:45,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:40:45,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:40:45,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 14 [2022-11-03 03:40:45,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522489702] [2022-11-03 03:40:45,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:40:45,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 03:40:45,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:45,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 03:40:45,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 03:40:45,256 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-03 03:40:45,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:45,643 INFO L93 Difference]: Finished difference Result 139 states and 180 transitions. [2022-11-03 03:40:45,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:40:45,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 64 [2022-11-03 03:40:45,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:45,645 INFO L225 Difference]: With dead ends: 139 [2022-11-03 03:40:45,645 INFO L226 Difference]: Without dead ends: 103 [2022-11-03 03:40:45,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 03:40:45,647 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:45,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 490 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:40:45,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-03 03:40:45,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2022-11-03 03:40:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 65 states have internal predecessors, (70), 22 states have call successors, (22), 11 states have call predecessors, (22), 14 states have return successors, (28), 21 states have call predecessors, (28), 21 states have call successors, (28) [2022-11-03 03:40:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2022-11-03 03:40:45,725 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 64 [2022-11-03 03:40:45,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:45,725 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2022-11-03 03:40:45,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-03 03:40:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2022-11-03 03:40:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:40:45,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:45,727 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:45,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:40:45,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:45,950 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:45,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:45,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1356635027, now seen corresponding path program 1 times [2022-11-03 03:40:45,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:45,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657033034] [2022-11-03 03:40:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:45,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:40:46,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:46,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657033034] [2022-11-03 03:40:46,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657033034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:40:46,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077795167] [2022-11-03 03:40:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:46,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:46,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:40:46,786 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:40:46,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:40:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:47,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-03 03:40:47,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:47,684 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-03 03:40:47,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 1 [2022-11-03 03:40:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:47,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:48,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-03 03:40:48,298 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:40:48,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-03 03:40:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:40:48,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077795167] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:48,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [840974159] [2022-11-03 03:40:48,489 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 03:40:48,489 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:40:48,489 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:40:48,490 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:40:48,490 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:40:48,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:48,588 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 03:40:48,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 03:40:48,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:48,684 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:40:48,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:40:48,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:48,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:48,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:48,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:48,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:48,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:40:48,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:48,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 03:40:48,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:40:49,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:49,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:49,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:49,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:49,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:49,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:40:49,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:49,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 03:40:49,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:40:49,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:49,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:49,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:49,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:49,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:49,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 03:40:49,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:49,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:49,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:49,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:49,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:49,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 03:40:50,730 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 134 for LOIs [2022-11-03 03:40:50,807 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 03:40:51,626 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 03:40:51,628 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 03:40:51,649 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 03:40:51,717 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:41:05,820 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5963#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| Int)) (and (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 0)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| 2)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| 5)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| 4)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 16) 0) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| 3)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 8) 0) (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 8) 0) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 1) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| 0)) (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 24)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 24) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 0) 16) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 16) 0))) (= 5 |~#s_can_fail_allocator_static~0.base|) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:41:05,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:41:05,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:41:05,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 15] total 38 [2022-11-03 03:41:05,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846009377] [2022-11-03 03:41:05,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:41:05,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 03:41:05,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:41:05,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 03:41:05,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=3799, Unknown=0, NotChecked=0, Total=4160 [2022-11-03 03:41:05,824 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand has 38 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 17 states have call successors, (28), 3 states have call predecessors, (28), 9 states have return successors, (27), 14 states have call predecessors, (27), 17 states have call successors, (27) [2022-11-03 03:41:08,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:08,606 INFO L93 Difference]: Finished difference Result 216 states and 293 transitions. [2022-11-03 03:41:08,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-03 03:41:08,607 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 17 states have call successors, (28), 3 states have call predecessors, (28), 9 states have return successors, (27), 14 states have call predecessors, (27), 17 states have call successors, (27) Word has length 66 [2022-11-03 03:41:08,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:08,608 INFO L225 Difference]: With dead ends: 216 [2022-11-03 03:41:08,609 INFO L226 Difference]: Without dead ends: 163 [2022-11-03 03:41:08,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 156 SyntacticMatches, 12 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=686, Invalid=7146, Unknown=0, NotChecked=0, Total=7832 [2022-11-03 03:41:08,611 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 271 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:08,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 975 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1106 Invalid, 0 Unknown, 212 Unchecked, 1.2s Time] [2022-11-03 03:41:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-03 03:41:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 140. [2022-11-03 03:41:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 95 states have internal predecessors, (103), 31 states have call successors, (31), 14 states have call predecessors, (31), 19 states have return successors, (53), 30 states have call predecessors, (53), 30 states have call successors, (53) [2022-11-03 03:41:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 187 transitions. [2022-11-03 03:41:08,683 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 187 transitions. Word has length 66 [2022-11-03 03:41:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:08,684 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 187 transitions. [2022-11-03 03:41:08,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 17 states have call successors, (28), 3 states have call predecessors, (28), 9 states have return successors, (27), 14 states have call predecessors, (27), 17 states have call successors, (27) [2022-11-03 03:41:08,685 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 187 transitions. [2022-11-03 03:41:08,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:41:08,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:08,686 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:41:08,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:08,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 03:41:08,887 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:41:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:08,887 INFO L85 PathProgramCache]: Analyzing trace with hash -277742896, now seen corresponding path program 2 times [2022-11-03 03:41:08,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:41:08,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175182538] [2022-11-03 03:41:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:08,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:41:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:41:11,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:41:11,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175182538] [2022-11-03 03:41:11,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175182538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:41:11,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108476777] [2022-11-03 03:41:11,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:41:11,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:41:11,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:41:11,864 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:41:11,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:41:12,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:41:12,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:41:12,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-03 03:41:12,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:41:14,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:21,497 INFO L356 Elim1Store]: treesize reduction 87, result has 9.4 percent of original size [2022-11-03 03:41:21,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 100 [2022-11-03 03:41:21,531 INFO L356 Elim1Store]: treesize reduction 58, result has 13.4 percent of original size [2022-11-03 03:41:21,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 55 [2022-11-03 03:41:22,825 INFO L356 Elim1Store]: treesize reduction 4, result has 95.3 percent of original size [2022-11-03 03:41:22,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 135 [2022-11-03 03:41:22,954 INFO L356 Elim1Store]: treesize reduction 13, result has 82.7 percent of original size [2022-11-03 03:41:22,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 133 [2022-11-03 03:41:27,203 INFO L356 Elim1Store]: treesize reduction 45, result has 2.2 percent of original size [2022-11-03 03:41:27,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 1 [2022-11-03 03:41:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:41:27,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108476777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:41:27,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [157619054] [2022-11-03 03:41:27,570 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 03:41:27,571 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:41:27,571 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:41:27,571 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:41:27,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:41:27,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:27,667 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 03:41:27,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 03:41:27,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:27,774 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:41:27,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:41:28,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:41:28,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:41:28,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 03:41:28,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:41:28,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:41:28,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 03:41:28,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 03:41:28,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:28,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 03:41:38,526 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 161 for LOIs [2022-11-03 03:41:38,811 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 03:41:39,485 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 143 for LOIs [2022-11-03 03:41:39,529 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 03:41:39,549 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 03:41:39,611 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:42:05,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7025#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86| Int)) (and (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) (+ 8 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) 0) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89| 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|) 0)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) (+ 8 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) (not (= 5 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|))) (not (= 2 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|))) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|) 4)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) 32) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) 1) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|) (- 8))) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) 0) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89| 16) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) (not (= 3 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|) (- 8))) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_89|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|))) (= (select (select |#memory_int| 1) 0) 48) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:42:05,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:42:05,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:42:05,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 22] total 53 [2022-11-03 03:42:05,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019057018] [2022-11-03 03:42:05,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:42:05,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-03 03:42:05,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:42:05,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-03 03:42:05,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=6038, Unknown=0, NotChecked=0, Total=6480 [2022-11-03 03:42:05,337 INFO L87 Difference]: Start difference. First operand 140 states and 187 transitions. Second operand has 53 states, 44 states have (on average 2.159090909090909) internal successors, (95), 45 states have internal predecessors, (95), 19 states have call successors, (30), 4 states have call predecessors, (30), 13 states have return successors, (28), 16 states have call predecessors, (28), 17 states have call successors, (28) [2022-11-03 03:42:15,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:42:15,595 INFO L93 Difference]: Finished difference Result 367 states and 624 transitions. [2022-11-03 03:42:15,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-03 03:42:15,596 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 44 states have (on average 2.159090909090909) internal successors, (95), 45 states have internal predecessors, (95), 19 states have call successors, (30), 4 states have call predecessors, (30), 13 states have return successors, (28), 16 states have call predecessors, (28), 17 states have call successors, (28) Word has length 67 [2022-11-03 03:42:15,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:42:15,600 INFO L225 Difference]: With dead ends: 367 [2022-11-03 03:42:15,600 INFO L226 Difference]: Without dead ends: 302 [2022-11-03 03:42:15,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4238 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=1089, Invalid=13917, Unknown=0, NotChecked=0, Total=15006 [2022-11-03 03:42:15,605 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 255 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 2848 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 3763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 2848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:42:15,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1365 Invalid, 3763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 2848 Invalid, 0 Unknown, 442 Unchecked, 4.4s Time] [2022-11-03 03:42:15,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-03 03:42:15,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 235. [2022-11-03 03:42:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 154 states have internal predecessors, (165), 61 states have call successors, (61), 21 states have call predecessors, (61), 30 states have return successors, (139), 59 states have call predecessors, (139), 60 states have call successors, (139) [2022-11-03 03:42:15,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 365 transitions. [2022-11-03 03:42:15,759 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 365 transitions. Word has length 67 [2022-11-03 03:42:15,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:42:15,760 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 365 transitions. [2022-11-03 03:42:15,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 44 states have (on average 2.159090909090909) internal successors, (95), 45 states have internal predecessors, (95), 19 states have call successors, (30), 4 states have call predecessors, (30), 13 states have return successors, (28), 16 states have call predecessors, (28), 17 states have call successors, (28) [2022-11-03 03:42:15,760 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 365 transitions. [2022-11-03 03:42:15,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 03:42:15,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:42:15,763 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:42:15,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:15,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 03:42:15,991 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:42:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:42:15,991 INFO L85 PathProgramCache]: Analyzing trace with hash -64232769, now seen corresponding path program 1 times [2022-11-03 03:42:15,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:42:15,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97222807] [2022-11-03 03:42:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:15,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:42:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 03:42:16,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:42:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97222807] [2022-11-03 03:42:16,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97222807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:42:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871115714] [2022-11-03 03:42:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:16,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:42:16,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:42:16,353 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:42:16,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:42:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:16,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-03 03:42:16,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:18,890 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_63| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_63| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_63|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_63|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_63| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_63| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_63|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_63|) 0)))) is different from true [2022-11-03 03:42:20,732 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_64| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_64|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_64| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_64|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64|) 0)))) is different from true [2022-11-03 03:42:21,552 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:42:21,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 03:42:21,558 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-03 03:42:21,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 1 [2022-11-03 03:42:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 6 not checked. [2022-11-03 03:42:21,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:22,183 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-03 03:42:22,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 03:42:22,196 INFO L356 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-03 03:42:22,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2022-11-03 03:42:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:42:22,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871115714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:42:22,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [692218976] [2022-11-03 03:42:22,230 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 03:42:22,230 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:42:22,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:42:22,231 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:42:22,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:42:22,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,320 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 03:42:22,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 03:42:22,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,407 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:42:22,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:42:22,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 03:42:22,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:42:22,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:42:22,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:42:22,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,875 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 03:42:22,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2022-11-03 03:42:22,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:42:22,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:22,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,079 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 03:42:23,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 03:42:23,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 03:42:23,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 03:42:23,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:23,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 03:42:23,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:23,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:23,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:23,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:23,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:23,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:24,210 INFO L356 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-03 03:42:24,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 698 treesize of output 707 [2022-11-03 03:42:24,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:24,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:24,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:24,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:24,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:24,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:24,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:24,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:24,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:24,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:24,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:24,674 INFO L356 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-11-03 03:42:24,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 724 treesize of output 727 [2022-11-03 03:42:24,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:24,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 03:42:25,102 INFO L356 Elim1Store]: treesize reduction 182, result has 18.0 percent of original size [2022-11-03 03:42:25,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 679 treesize of output 691 [2022-11-03 03:42:25,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:25,181 INFO L356 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-03 03:42:25,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 716 treesize of output 669 [2022-11-03 03:42:25,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:25,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:25,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 690 treesize of output 669 [2022-11-03 03:42:25,520 INFO L356 Elim1Store]: treesize reduction 246, result has 16.3 percent of original size [2022-11-03 03:42:25,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 682 treesize of output 701 [2022-11-03 03:42:31,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:42:31,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:42:31,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:31,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 03:42:31,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:31,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:31,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 03:42:32,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:32,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 03:42:32,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:32,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 03:42:32,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:32,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:32,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 03:42:32,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:32,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:42:32,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:32,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 03:42:32,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:32,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:42:33,102 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2022-11-03 03:42:33,126 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2022-11-03 03:42:33,879 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-11-03 03:42:33,881 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 03:42:33,898 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 03:42:33,957 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:42:42,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8506#(and (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_173| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_173| Int)) (and (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_173|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_173| 24))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_173|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_173| 24)) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_173|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_173| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_173|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_173| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_173|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_173| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_173|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_173|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_173|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_173| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_173|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_173| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_173| 16)))) (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 5 |~#s_can_fail_allocator_static~0.base|) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-11-03 03:42:42,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:42:42,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:42:42,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18, 14] total 31 [2022-11-03 03:42:42,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348042275] [2022-11-03 03:42:42,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:42:42,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 03:42:42,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:42:42,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 03:42:42,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2834, Unknown=2, NotChecked=218, Total=3306 [2022-11-03 03:42:42,108 INFO L87 Difference]: Start difference. First operand 235 states and 365 transitions. Second operand has 31 states, 27 states have (on average 3.111111111111111) internal successors, (84), 28 states have internal predecessors, (84), 13 states have call successors, (26), 5 states have call predecessors, (26), 10 states have return successors, (26), 11 states have call predecessors, (26), 13 states have call successors, (26) [2022-11-03 03:42:44,587 WARN L855 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_64| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_64|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_64| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_64|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64|) 0)))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_63| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_63| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_63|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_63|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_63| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_63| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_63|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_63|) 0))))) is different from true [2022-11-03 03:42:46,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:42:46,257 INFO L93 Difference]: Finished difference Result 392 states and 581 transitions. [2022-11-03 03:42:46,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 03:42:46,258 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 3.111111111111111) internal successors, (84), 28 states have internal predecessors, (84), 13 states have call successors, (26), 5 states have call predecessors, (26), 10 states have return successors, (26), 11 states have call predecessors, (26), 13 states have call successors, (26) Word has length 71 [2022-11-03 03:42:46,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:42:46,262 INFO L225 Difference]: With dead ends: 392 [2022-11-03 03:42:46,262 INFO L226 Difference]: Without dead ends: 251 [2022-11-03 03:42:46,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 164 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=532, Invalid=6449, Unknown=3, NotChecked=498, Total=7482 [2022-11-03 03:42:46,273 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 149 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:42:46,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 483 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 760 Invalid, 0 Unknown, 402 Unchecked, 0.8s Time] [2022-11-03 03:42:46,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-03 03:42:46,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 220. [2022-11-03 03:42:46,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 137 states have (on average 1.145985401459854) internal successors, (157), 143 states have internal predecessors, (157), 54 states have call successors, (54), 24 states have call predecessors, (54), 28 states have return successors, (81), 52 states have call predecessors, (81), 53 states have call successors, (81) [2022-11-03 03:42:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 292 transitions. [2022-11-03 03:42:46,495 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 292 transitions. Word has length 71 [2022-11-03 03:42:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:42:46,497 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 292 transitions. [2022-11-03 03:42:46,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 3.111111111111111) internal successors, (84), 28 states have internal predecessors, (84), 13 states have call successors, (26), 5 states have call predecessors, (26), 10 states have return successors, (26), 11 states have call predecessors, (26), 13 states have call successors, (26) [2022-11-03 03:42:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 292 transitions. [2022-11-03 03:42:46,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 03:42:46,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:42:46,501 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:42:46,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:46,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 03:42:46,727 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:42:46,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:42:46,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2056550632, now seen corresponding path program 1 times [2022-11-03 03:42:46,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:42:46,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954595007] [2022-11-03 03:42:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:46,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:42:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 03:42:48,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:42:48,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954595007] [2022-11-03 03:42:48,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954595007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:42:48,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492446785] [2022-11-03 03:42:48,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:48,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:42:48,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:42:48,235 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:42:48,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:42:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:48,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-03 03:42:48,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:50,877 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78|) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78|))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78|) (+ 16 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78|))))) is different from true [2022-11-03 03:42:52,957 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79|) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79|))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79| Int)) (not (= (+ 16 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79|) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79|))))) is different from true [2022-11-03 03:42:55,085 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_217| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_217| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_217|) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_217| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_217|) 0) 16)))) is different from true [2022-11-03 03:42:57,226 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_70| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_70|) 0) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_70|))) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_70| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_70|) 0) 16)))) is different from true [2022-11-03 03:43:07,308 WARN L234 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:43:21,400 WARN L234 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:43:31,499 WARN L234 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:43:41,676 WARN L234 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:43:49,787 WARN L234 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:43:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 6 not checked. [2022-11-03 03:43:49,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:52,652 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:43:52,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 03:43:52,665 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:43:52,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 25 [2022-11-03 03:43:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:43:52,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492446785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:52,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2140223167] [2022-11-03 03:43:52,749 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 03:43:52,750 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:43:52,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:43:52,750 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:43:52,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:43:52,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:52,843 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:43:52,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:43:52,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:52,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 03:43:53,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:43:53,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:43:53,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:43:53,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 03:43:53,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,408 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 03:43:53,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 03:43:53,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:43:53,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 03:43:53,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:53,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 03:43:53,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-03 03:43:53,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 03:43:53,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:53,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:53,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:53,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:53,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:53,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:54,284 INFO L356 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-03 03:43:54,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 698 treesize of output 707 [2022-11-03 03:43:54,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:54,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:54,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:54,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:54,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:54,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:54,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:54,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:54,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:54,878 INFO L356 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-03 03:43:54,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 712 treesize of output 721 [2022-11-03 03:43:55,401 INFO L356 Elim1Store]: treesize reduction 230, result has 21.8 percent of original size [2022-11-03 03:43:55,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 684 treesize of output 719 [2022-11-03 03:43:55,599 INFO L356 Elim1Store]: treesize reduction 126, result has 13.7 percent of original size [2022-11-03 03:43:55,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 677 treesize of output 689 [2022-11-03 03:43:55,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:55,681 INFO L356 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-03 03:43:55,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 714 treesize of output 667 [2022-11-03 03:43:55,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 688 treesize of output 667 [2022-11-03 03:43:56,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:56,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 03:43:56,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:43:56,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:43:56,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:56,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:56,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 03:43:56,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:56,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 03:43:56,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:56,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 03:43:57,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:57,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 03:43:57,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:57,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 03:43:57,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:57,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:57,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 03:43:57,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:57,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:43:57,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:57,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:43:58,565 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-03 03:43:58,586 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 03:43:59,258 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 03:43:59,260 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 03:43:59,278 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 03:43:59,337 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:44:13,655 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9963#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_195| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_195| Int)) (and (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_195| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_195|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_195|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_195|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_195| 24))) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_195| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_195|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_195| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_195|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_195| 24)))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_195|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_195| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_195|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_195| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_195|) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_195|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_195| 24)) 0))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:44:13,655 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:44:13,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:44:13,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19, 14] total 35 [2022-11-03 03:44:13,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613284008] [2022-11-03 03:44:13,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:44:13,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 03:44:13,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:13,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 03:44:13,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=3050, Unknown=14, NotChecked=460, Total=3782 [2022-11-03 03:44:13,658 INFO L87 Difference]: Start difference. First operand 220 states and 292 transitions. Second operand has 35 states, 32 states have (on average 2.90625) internal successors, (93), 33 states have internal predecessors, (93), 15 states have call successors, (28), 6 states have call predecessors, (28), 10 states have return successors, (27), 12 states have call predecessors, (27), 15 states have call successors, (27) [2022-11-03 03:44:38,355 WARN L855 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78|) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78|))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78|) (+ 16 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78|))))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79|) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79|))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79| Int)) (not (= (+ 16 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79|) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79|)))))) is different from true [2022-11-03 03:45:32,970 WARN L234 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:45:49,030 WARN L234 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:46:03,093 WARN L234 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:46:13,153 WARN L234 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:46:15,163 WARN L855 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78|) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78|))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78|) (+ 16 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78|))))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_70| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_70|) 0) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_70|))) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_70| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_70|) 0) 16)))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79|) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79|))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79| Int)) (not (= (+ 16 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79|) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_79|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_79|)))))) is different from true [2022-11-03 03:46:27,219 WARN L234 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:46:39,306 WARN L234 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:46:40,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:40,800 INFO L93 Difference]: Finished difference Result 405 states and 537 transitions. [2022-11-03 03:46:40,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 03:46:40,800 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.90625) internal successors, (93), 33 states have internal predecessors, (93), 15 states have call successors, (28), 6 states have call predecessors, (28), 10 states have return successors, (27), 12 states have call predecessors, (27), 15 states have call successors, (27) Word has length 72 [2022-11-03 03:46:40,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:40,802 INFO L225 Difference]: With dead ends: 405 [2022-11-03 03:46:40,802 INFO L226 Difference]: Without dead ends: 266 [2022-11-03 03:46:40,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 166 SyntacticMatches, 10 SemanticMatches, 87 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 222.8s TimeCoverageRelationStatistics Valid=530, Invalid=6239, Unknown=61, NotChecked=1002, Total=7832 [2022-11-03 03:46:40,809 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 107 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 2612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 778 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:40,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 757 Invalid, 2612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1629 Invalid, 0 Unknown, 778 Unchecked, 1.6s Time] [2022-11-03 03:46:40,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-03 03:46:40,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 243. [2022-11-03 03:46:40,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 155 states have (on average 1.1290322580645162) internal successors, (175), 161 states have internal predecessors, (175), 57 states have call successors, (57), 27 states have call predecessors, (57), 30 states have return successors, (81), 54 states have call predecessors, (81), 56 states have call successors, (81) [2022-11-03 03:46:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 313 transitions. [2022-11-03 03:46:40,932 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 313 transitions. Word has length 72 [2022-11-03 03:46:40,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:40,933 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 313 transitions. [2022-11-03 03:46:40,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.90625) internal successors, (93), 33 states have internal predecessors, (93), 15 states have call successors, (28), 6 states have call predecessors, (28), 10 states have return successors, (27), 12 states have call predecessors, (27), 15 states have call successors, (27) [2022-11-03 03:46:40,933 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 313 transitions. [2022-11-03 03:46:40,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 03:46:40,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:40,935 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:40,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:41,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 03:46:41,154 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:41,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:41,154 INFO L85 PathProgramCache]: Analyzing trace with hash -573706957, now seen corresponding path program 1 times [2022-11-03 03:46:41,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:41,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670307046] [2022-11-03 03:46:41,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:41,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 03:46:41,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:41,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670307046] [2022-11-03 03:46:41,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670307046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:41,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:41,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:46:41,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80729849] [2022-11-03 03:46:41,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:41,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:46:41,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:46:41,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:46:41,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:46:41,379 INFO L87 Difference]: Start difference. First operand 243 states and 313 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-03 03:46:41,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:41,693 INFO L93 Difference]: Finished difference Result 257 states and 330 transitions. [2022-11-03 03:46:41,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:46:41,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 70 [2022-11-03 03:46:41,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:41,696 INFO L225 Difference]: With dead ends: 257 [2022-11-03 03:46:41,696 INFO L226 Difference]: Without dead ends: 255 [2022-11-03 03:46:41,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:46:41,697 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:41,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 281 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:46:41,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-03 03:46:41,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 251. [2022-11-03 03:46:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 158 states have (on average 1.1265822784810127) internal successors, (178), 164 states have internal predecessors, (178), 61 states have call successors, (61), 28 states have call predecessors, (61), 31 states have return successors, (85), 58 states have call predecessors, (85), 60 states have call successors, (85) [2022-11-03 03:46:41,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 324 transitions. [2022-11-03 03:46:41,889 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 324 transitions. Word has length 70 [2022-11-03 03:46:41,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:41,889 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 324 transitions. [2022-11-03 03:46:41,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-03 03:46:41,890 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 324 transitions. [2022-11-03 03:46:41,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 03:46:41,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:41,891 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:41,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 03:46:41,892 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:41,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:41,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1081195759, now seen corresponding path program 3 times [2022-11-03 03:46:41,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:41,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147681074] [2022-11-03 03:46:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:41,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:46:43,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:43,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147681074] [2022-11-03 03:46:43,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147681074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:46:43,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159878855] [2022-11-03 03:46:43,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:46:43,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:46:43,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:46:43,531 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:46:43,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 03:46:43,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:46:43,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:46:43,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-03 03:46:43,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:43,988 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:46:43,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 03:46:44,003 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:46:44,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 03:47:09,058 WARN L234 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:47:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:47:09,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:47:10,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159878855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:10,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1417129713] [2022-11-03 03:47:10,226 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 03:47:10,226 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:47:10,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:47:10,227 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:47:10,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:47:10,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,319 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:47:10,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:47:10,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 03:47:10,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:47:10,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 03:47:10,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:47:10,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:47:10,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 03:47:10,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:47:10,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 03:47:10,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:47:10,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 03:47:19,895 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 150 for LOIs [2022-11-03 03:47:20,104 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 03:47:20,774 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 143 for LOIs [2022-11-03 03:47:20,823 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 03:47:20,841 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 03:47:20,899 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:47:41,729 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12259#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (<= 5 |~#s_can_fail_allocator_static~0.base|) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207|) 0) 16) (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207|) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207|)) (not (= 5 |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207|)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207|) 0)) (not (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207| 4)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207|) 24) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207|) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207|) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207|) 16) 0) (not (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207| 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207|) 16) 0) (= 32 (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_BEFORE_CALL_207|)))) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 03:47:41,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:47:41,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:47:41,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14] total 39 [2022-11-03 03:47:41,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488302548] [2022-11-03 03:47:41,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:47:41,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 03:47:41,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:41,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 03:47:41,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=3991, Unknown=7, NotChecked=0, Total=4422 [2022-11-03 03:47:41,732 INFO L87 Difference]: Start difference. First operand 251 states and 324 transitions. Second operand has 39 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 37 states have internal predecessors, (105), 20 states have call successors, (33), 4 states have call predecessors, (33), 8 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2022-11-03 03:48:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:01,846 INFO L93 Difference]: Finished difference Result 411 states and 505 transitions. [2022-11-03 03:48:01,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 03:48:01,847 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 37 states have internal predecessors, (105), 20 states have call successors, (33), 4 states have call predecessors, (33), 8 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) Word has length 73 [2022-11-03 03:48:01,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:01,849 INFO L225 Difference]: With dead ends: 411 [2022-11-03 03:48:01,849 INFO L226 Difference]: Without dead ends: 275 [2022-11-03 03:48:01,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 170 SyntacticMatches, 13 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2389 ImplicationChecksByTransitivity, 65.3s TimeCoverageRelationStatistics Valid=677, Invalid=6280, Unknown=15, NotChecked=0, Total=6972 [2022-11-03 03:48:01,852 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 177 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:01,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 1086 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 972 Invalid, 0 Unknown, 204 Unchecked, 0.9s Time] [2022-11-03 03:48:01,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-03 03:48:02,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 264. [2022-11-03 03:48:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 176 states have (on average 1.125) internal successors, (198), 184 states have internal predecessors, (198), 50 states have call successors, (50), 31 states have call predecessors, (50), 37 states have return successors, (67), 48 states have call predecessors, (67), 49 states have call successors, (67) [2022-11-03 03:48:02,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 315 transitions. [2022-11-03 03:48:02,024 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 315 transitions. Word has length 73 [2022-11-03 03:48:02,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:02,024 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 315 transitions. [2022-11-03 03:48:02,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 37 states have internal predecessors, (105), 20 states have call successors, (33), 4 states have call predecessors, (33), 8 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2022-11-03 03:48:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 315 transitions. [2022-11-03 03:48:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 03:48:02,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:02,026 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:02,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:02,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 03:48:02,243 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:02,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:02,243 INFO L85 PathProgramCache]: Analyzing trace with hash -752805035, now seen corresponding path program 1 times [2022-11-03 03:48:02,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:02,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432549979] [2022-11-03 03:48:02,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:02,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 03:48:03,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:03,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432549979] [2022-11-03 03:48:03,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432549979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:48:03,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081504049] [2022-11-03 03:48:03,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:03,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:03,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:03,583 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:03,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 03:48:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:03,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-03 03:48:03,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:31,166 WARN L234 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:48:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:48:33,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:34,113 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:48:34,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2022-11-03 03:48:34,130 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:48:34,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-03 03:48:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:48:34,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081504049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:34,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1145476169] [2022-11-03 03:48:34,216 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 03:48:34,217 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:48:34,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:48:34,217 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:48:34,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:48:34,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,304 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:48:34,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:48:34,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 03:48:34,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 03:48:34,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:48:34,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:48:34,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:48:34,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 03:48:34,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 03:48:34,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 03:48:34,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:34,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:48:44,065 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 150 for LOIs [2022-11-03 03:48:44,300 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2022-11-03 03:48:44,830 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 143 for LOIs [2022-11-03 03:48:44,868 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 03:48:44,884 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 03:48:44,939 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:49:05,129 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13802#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 5 |~#s_can_fail_allocator_static~0.base|) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|) 24) |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|) 8) 0) (= (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|) 32) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|) 24)) |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|) 16) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|) 16) 0) (not (= |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77| 2)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|) 24) 0) (not (= 5 |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|) 1) (not (= |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77| 0)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|) (not (= |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77| 3)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|) 24)) 16) (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77|) 8) 0) (not (= |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_77| 4)))) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:49:05,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:49:05,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:49:05,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14] total 38 [2022-11-03 03:49:05,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189005912] [2022-11-03 03:49:05,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:49:05,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 03:49:05,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:49:05,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 03:49:05,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=3892, Unknown=8, NotChecked=0, Total=4290 [2022-11-03 03:49:05,131 INFO L87 Difference]: Start difference. First operand 264 states and 315 transitions. Second operand has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 34 states have internal predecessors, (108), 19 states have call successors, (32), 4 states have call predecessors, (32), 9 states have return successors, (31), 19 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-03 03:49:34,749 WARN L234 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:49:37,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:37,801 INFO L93 Difference]: Finished difference Result 352 states and 438 transitions. [2022-11-03 03:49:37,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 03:49:37,802 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 34 states have internal predecessors, (108), 19 states have call successors, (32), 4 states have call predecessors, (32), 9 states have return successors, (31), 19 states have call predecessors, (31), 18 states have call successors, (31) Word has length 75 [2022-11-03 03:49:37,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:37,804 INFO L225 Difference]: With dead ends: 352 [2022-11-03 03:49:37,804 INFO L226 Difference]: Without dead ends: 284 [2022-11-03 03:49:37,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 180 SyntacticMatches, 11 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2872 ImplicationChecksByTransitivity, 81.2s TimeCoverageRelationStatistics Valid=763, Invalid=7962, Unknown=17, NotChecked=0, Total=8742 [2022-11-03 03:49:37,807 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 196 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:37,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 968 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 999 Invalid, 0 Unknown, 276 Unchecked, 0.9s Time] [2022-11-03 03:49:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-03 03:49:37,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 258. [2022-11-03 03:49:37,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 173 states have (on average 1.115606936416185) internal successors, (193), 180 states have internal predecessors, (193), 48 states have call successors, (48), 31 states have call predecessors, (48), 36 states have return successors, (63), 46 states have call predecessors, (63), 47 states have call successors, (63) [2022-11-03 03:49:37,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 304 transitions. [2022-11-03 03:49:37,935 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 304 transitions. Word has length 75 [2022-11-03 03:49:37,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:37,936 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 304 transitions. [2022-11-03 03:49:37,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 34 states have internal predecessors, (108), 19 states have call successors, (32), 4 states have call predecessors, (32), 9 states have return successors, (31), 19 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-03 03:49:37,936 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 304 transitions. [2022-11-03 03:49:37,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-03 03:49:37,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:37,938 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:37,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:38,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 03:49:38,167 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:38,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:38,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1933036985, now seen corresponding path program 2 times [2022-11-03 03:49:38,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:49:38,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723467453] [2022-11-03 03:49:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:38,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:49:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 63 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 03:49:41,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:49:41,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723467453] [2022-11-03 03:49:41,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723467453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:49:41,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089254979] [2022-11-03 03:49:41,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:49:41,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:41,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:41,879 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:41,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37713c48-71c2-4e58-b425-693dcee2fa22/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 03:49:42,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:49:42,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:49:42,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 03:49:42,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:10,149 WARN L234 SmtUtils]: Spent 8.38s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:50:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 03:50:33,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 03:50:40,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089254979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:40,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1810568740] [2022-11-03 03:50:40,707 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 03:50:40,708 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:50:40,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:50:40,708 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:50:40,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:50:40,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:40,787 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:50:40,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:50:40,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:40,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 03:50:40,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:40,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:40,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:40,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:40,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:40,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:50:41,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 03:50:41,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:50:41,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 03:50:41,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:41,126 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 03:50:41,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 03:50:41,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:41,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:41,179 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 03:50:41,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 03:50:41,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,291 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 03:50:41,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 03:50:41,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:50:41,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 03:50:41,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-03 03:50:41,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:50:41,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:50:41,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:41,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 03:50:41,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 03:50:41,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 03:50:41,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 03:50:41,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 03:50:41,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 03:50:41,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 03:50:41,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:41,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 03:50:41,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:50:41,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:50:41,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:50:41,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 03:50:41,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 03:50:41,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:41,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 03:50:43,181 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-03 03:50:43,201 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 03:50:43,910 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 03:50:43,911 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 03:50:43,927 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 03:50:43,982 INFO L180 IcfgInterpreter]: Interpretation finished